Cross-cultural and Moroccan Validation of the University of Washington Quality of Life Questionnaire for Patients With Head and Neck Cancer

Abstract

To translate the original English version of the University of Washington Quality of Life (UW-QOL) questionnaire into Moroccan Arabic version and investigate its psychometric validity and reliability for Moroccan-speaking patients with head and neck cancer. The UW-QOL was conducted in 104 patients treated for head and neck cancer in the department of head and neck surgery, Ibn Rochd university hospital, Casablanca. A control group of 57 healthy volunteers was also evaluated. The questionnaire was translated into Moroccan language. Cronbach's alpha coefficient was 0.829, suggesting good internal consistency, and test-retest reliability was excellent (intraclass correlation coefficient [ICC] = 0.987). A good correlation was observed between UW-QOL composite scores and European Organization for Research and Treatment of Cancer Quality of Life Core Questionnaire (EORTC QLQ-C30) global health status/QOL scores (P < .001). There was also low concordance between the UW-QOL scores and the Physical Component Summary and Mental Component Summary scores of the 36-Item Short-Form questionnaire (SF-36) (P = .017 and P = .014, respectively). The Moroccan UW-QOL questionnaire appears to be culturally appropriate and psychometrically valid.